Portion of tractor



FIG. 1 is a perspective view of the portion of tractor according to the invention;

FIG. 2 is a front elevation view of the portion of tractor of FIG. 1;

FIG. 3 is a rear elevation view of the portion of tractor of FIG. 1;

FIG. 4 is a left side elevation view of the portion of tractor of FIG. 1;

FIG. 5 is a right side elevation view of the portion of tractor of FIG. 1;

FIG. 6 is a top plan view of the portion of tractor of FIG. 1;

FIG. 7 is an enlarged, partial right side elevation view of the portion of tractor of FIG. 1; and,

FIG. 8 is an enlarged, partial perspective view of the portion of tractor of FIG. 1.

The broken line disclosure, as well as line shading in parts of the drawings are included for the purpose of illustrating use and environment and form no part of the claimed design. 

CLAIM The ornamental design for a portion of tractor, as shown and described. 